GEOG 111 Lecture Notes - Lecture 8: Francis Bacon, Mid-Ocean Ridge, Igneous Rock
Document Summary
Pay attention to thing on board during exam for answering questions. Tectonic cycle: causes earth"s plates to move to new locations. Rock cycle: how earth materials transition to different types. Only a handful of elements make up earth"s crust. Three classes of rocks that make up earth"s rock cycle. Igneous rocks: form when molten material from beneath the surface solidifies into rock. Extrusive igneous rock: forms above the surface. Lava, magma that"s been ejected from a volcano, often then forms extrusive rock. Our planet is made up of a good deal of igneous rock that we. Sedimentary rock: water erodes material and said material piles up, don"t necessarily see on the surface compressing the lower layers, eventually squeezing all the water out, compacting and cementing them until they become rock. Clastic: formed through small particles being compressed compacted and cemented. Metamorphic rock: forms when heat and pressure are applied to existing rock (igneous and sedimentary)
